![]() When a monograph specifies that an article responds to the test for dry chlorides, mix the solid to be tested with an equal weight of manganese dioxide, moisten with sulfuric acid, and gently heat the mixture: chlorine, which is recognizable by the production of a blue color with moistened starch iodide paper, is evolved. Add ammonia TS dropwise to this precipitate. (1) Solutions of bromides yield a pale yellow precipitate with silver nitrate TS. ![]() Wash the precipitate with three 1-mL portions of nitric acid solution (1 in 100), and discard the washings. Centrifuge the mixture without delay, and decant the supernatant layer. When testing amine (including alkaloidal) hydrochlorides that do not respond to the above test, add one drop of diluted nitric acid and 0.5 mL of silver nitrate TS to a solution of the substance being examined containing, unless otherwise directed in the monograph, about 2 mg of chloride ion in 2 mL: a white, curdy precipitate is formed. Typical silver chloride precipitate looks very strange. Silver Nitrate in urine acidulated with nitric. With silver nitrate TS, solutions of chlorides yield a white, curdy precipitate that is insoluble in nitric acid but is soluble in a slight excess of 6 N ammonium hydroxide. 597 195K views 9 years ago Just what happens if everything is hot and in high concentration. Barium Chloride in urine acidified with hydrochloric acid precipitates sulphuric acid as barium sulphate.
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